Storm Front (Dresden Files Series #1)
Lightweight urban fantasy noir, with a decent amount of worldbuilding. It's fluff, but a decent easy read, and having read several of the later books, I know that the series improves substantially in both tone and writing.
I originally rated this 4, but realised I was rating the series as a whole. Starting over properly and reading them in order, this is not quite up to the later books, but it's a good start.
And on to book 2.